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    • 4. 发明授权
    • Epoxy acid based biodegradable set retarder for a cement composition
    • 用于水泥组合物的环氧酸基可生物降解阻滞剂
    • US08327938B2
    • 2012-12-11
    • US12711945
    • 2010-02-24
    • Abhijit TarafdarDibyadarshani SenapatiGirish Dinkar SarapRahul Chandrakant Patil
    • Abhijit TarafdarDibyadarshani SenapatiGirish Dinkar SarapRahul Chandrakant Patil
    • E21B33/13
    • C09K8/467C04B24/281C04B28/02C04B2103/0046C04B2103/22Y02W30/92C04B14/10C04B14/108C04B18/08C04B2103/0085C04B2103/10C04B2103/40C04B2103/42C04B2103/46C04B2103/50
    • Compositions and methods according to the invention are directed to a cement composition for use in a subterranean formation. The cement composition comprises: (A) cement; (B) water; and (C) a polymer, wherein the polymer: (i) comprises a monomer or monomers selected from the group consisting of epoxysuccinic acid, a substituted epoxysuccinic acid, and an alkali metal salt, alkaline earth metal salt, or ammonium salt of any of the foregoing, and any combination of any of the foregoing; (ii) has the following characteristics: (a) is water soluble; and (b) is biodegradable; and (iii) is capable of providing: (a) a thickening time of at least 2 hours for a test composition at a temperature of 190° F. and a pressure of 5,160 psi; and (b) an initial setting time of less than 24 hours for the test composition at a temperature of 217° F. and a pressure of 3,000 psi, wherein the test composition consists of 860 grams of Class-H Portland cement, 325 grams of deionized water, and 0.4% by weight of the cement of the polymer. The method comprises the steps of: (A) introducing the cement composition into the subterranean formation; and (B) allowing the cement composition to set after introduction into the subterranean formation.
    • 根据本发明的组合物和方法涉及用于地下地层的水泥组合物。 水泥组合物包括:(A)水泥; (B)水; 和(C)聚合物,其中所述聚合物:(i)包含选自环氧琥珀酸,取代的环氧琥珀酸和碱金属盐,碱土金属盐或铵盐中的任何一种的单体或单体 前述内容,以及任何前述内容的任何组合; (ii)具有以下特征:(a)是水溶性的; 和(b)是可生物降解的; 和(iii)能够提供:(a)在190°F的温度和5,160psi的压力下对于测试组合物的至少2小时的增稠时间; 和(b)测试组合物在217°F的温度和3,000psi的压力下的初始凝固时间小于24小时,其中测试组合物由860克H类波特兰水泥,325克 去离子水和0.4重量%的聚合物的水泥。 该方法包括以下步骤:(A)将水泥组合物引入地层; 和(B)允许水泥组合物在引入地层之后凝固。
    • 8. 发明申请
    • EPOXY ACID BASED BIODEGRADABLE SET RETARDER FOR A CEMENT COMPOSITION
    • 用于水泥组合物的基于环氧基的生物可降解组合物
    • US20110203796A1
    • 2011-08-25
    • US12711945
    • 2010-02-24
    • Abhijit TarafdarDibyadarshani SenapatiGirish Dinkar SarapRahul Chandrakant Patil
    • Abhijit TarafdarDibyadarshani SenapatiGirish Dinkar SarapRahul Chandrakant Patil
    • E21B33/13C09K8/42
    • C09K8/467C04B24/281C04B28/02C04B2103/0046C04B2103/22Y02W30/92C04B14/10C04B14/108C04B18/08C04B2103/0085C04B2103/10C04B2103/40C04B2103/42C04B2103/46C04B2103/50
    • Compositions and methods according to the invention are directed to a cement composition for use in a subterranean formation. The cement composition comprises: (A) cement; (B) water; and (C) a polymer, wherein the polymer: (i) comprises a monomer or monomers selected from the group consisting of epoxysuccinic acid, a substituted epoxysuccinic acid, and an alkali metal salt, alkaline earth metal salt, or ammonium salt of any of the foregoing, and any combination of any of the foregoing; (ii) has the following characteristics: (a) is water soluble; and (b) is biodegradable; and (iii) is capable of providing: (a) a thickening time of at least 2 hours for a test composition at a temperature of 190° F. and a pressure of 5,160 psi; and (b) an initial setting time of less than 24 hours for the test composition at a temperature of 217° F. and a pressure of 3,000 psi, wherein the test composition consists of 860 grams of Class-H Portland cement, 325 grams of deionized water, and 0.4% by weight of the cement of the polymer. The method comprises the steps of: (A) introducing the cement composition into the subterranean formation; and (B) allowing the cement composition to set after introduction into the subterranean formation.
    • 根据本发明的组合物和方法涉及用于地下地层的水泥组合物。 水泥组合物包括:(A)水泥; (B)水; 和(C)聚合物,其中所述聚合物:(i)包含选自环氧琥珀酸,取代的环氧琥珀酸和碱金属盐,碱土金属盐或铵盐中的任何一种的单体或单体 前述内容,以及任何前述内容的任何组合; (ii)具有以下特征:(a)是水溶性的; 和(b)是可生物降解的; 和(iii)能够提供:(a)在190°F的温度和5,160psi的压力下对于测试组合物的至少2小时的增稠时间; 和(b)测试组合物在217°F的温度和3,000psi的压力下的初始凝固时间小于24小时,其中测试组合物由860克H类波特兰水泥,325克 去离子水和0.4重量%的聚合物的水泥。 该方法包括以下步骤:(A)将水泥组合物引入地层; 和(B)允许水泥组合物在引入地层之后凝固。